SIGIL

(Latest version is 0.9.0, November 14 2016)

SIGIL stands for Sound, Input, and Graphics Integration Library. It is meant to be a mind-bogglingly simple alternative to other, more complex libraries when all you want is to make a small game, teach basic 2D graphics, or otherwise remove the complexities of media programming from your C or C++ code. It's also cross-platform!

It's designed to be really easy to use. Here is a simple example program demonstrating sprites, text, rectangles, and lines.